Setting fuelinjection timing on Yanmar & clones

[skoleskibe]

Had an idea to day, whilst fiddling with a new fuelpump on my Yanmar l100.

In stead of using shims eg. .5mm to ajust injection timing, one could use a thin soft rubber gasket, that will compress when the three nuts holding the pump are tightned. In that way it should be possible to advance or retard injection timing just by slightly loosening or tightning the three nuts holding the pump. According to Yanmar 1/10mm equals 1 degree either way, as the thread is 6*1 one tenth revolution on all three nuts equals one degree ajustment of the injection timing. I'll stress out that the use of nyloc nuts must be paramount, even though the body of the pump is under springload all the time.

Any comments ?

[alexanderfoti]

Sounds like it could work, the only problem is acurately mesuring 1/10th when turning the bolts

[coachgeo]

neat idea. Not sure it would work with a multi cylinder diesel. Not sure how you could get a somewhat exact match between cylinders.....

[skoleskibe]

To measure 1/10 mm using a 6x1 metric, requires exactly 36* rotation of All three nuts.

[alexanderfoti]

I love this idea!

[XLerate]

Sounds good but just one caution. I've found of late that all nylock insert nuts are NOT CREATED EQUAL! Some of the Chinese stuff seems to have a very inferior grade of plastic insert, not the original high grade nylon as used by Nyloc. The cheapo hardware store type will not maintain the exact torque specs that the top quality nuts will.

Also of course, the exact material of the 'rubber' gasket should be impervious to fuels, heat etc. so that it doesn't seriously harden or whatever.

Otherwise a brilliant plan there! I'm always up for easy ha!